UCl3
hP8
(176) P63/m – hc
UCl3 [2]
Structural features: Infinite columns of base-linked UCl6Cl3 tricapped trigonal prisms share atoms to form
a 3D-framework with channels of hexagonal cross-section parallel to [001]. See Fig. IV.49.
Fig. IV.49. UCl3
Arrangement of UCl6Cl3 tricapped trigonal prisms viewed along [001]. Light and dark
prisms are shifted by c/2.
Schleid T. et al. (1987) [1]
Cl3U
a = 0.74439, c = 0.43243 nm, c/a = 0.581, V = 0.2075 nm3, Z = 2
site
Wyck. sym.
x
y
z
occ.
atomic environment
__________________________________________________________________________________________________________________________________________________________________________
Cl1
U2
6h
2c
m..
-6..
0.3866
1
/3
0.085
2
/3
1
1
/4
/4
non-coplanar triangle U3
tricapped trigonal prism Cl9
__________________________________________________________________________________________________________________________________________________________________________
Transformation from published data: y,x,-z
Experimental: single crystal, diffractometer, X-rays, wR = 0.023
Remarks: The data from [2] are also reported in [3]. In [3] the Wyckoff position of the U site is
misprinted as 2a (coordinates not specified) instead of 2c.
Landolt-Börnstein
New Series III/43A4
References: [1] Schleid T., Meyer G., Morss L.R. (1987), J. Less-Common Met. 132, 69-77. [2]
Zachariasen W.H. (1948), J. Chem. Phys. 16, 254. [3] Zachariasen W.H. (1948), Acta Crystallogr. 1, 265268.
Landolt-Börnstein
New Series III/43A4